CN201874958U

CN201874958U - Locking nut

Info

Publication number: CN201874958U
Application number: CN2010205993751U
Authority: CN
Inventors: 任鹏波
Original assignee: ZHEJIANG NEW EASTERN FASTENERS CO Ltd
Current assignee: ZHEJIANG NEW EASTERN FASTENERS CO Ltd
Priority date: 2010-11-10
Filing date: 2010-11-10
Publication date: 2011-06-22
Anticipated expiration: 2020-11-10

Abstract

A locking nut belongs to the technical field of fasteners, comprises a nut body, and is characterized in that a convex ring is disposed on one lateral surface of the nut body, a coaxial central threaded hole with the same aperture is disposed inside the nut body and the convex ring, and pits are extruded on the upper surface of the convex ring by the aid of external force. The locking nut is simple in structure and reasonable in design, the convex ring is disposed on the nut body and a plurality of pits are extruded on the convex ring, and portions of a thread at the pits deform under effect of the pits, thereby a bolt tightened to the pits can be resisted, torsion can be applied in place after the bolt and the nut are tightened by the aid of a common wrench. Besides, the bolt can be locked and fixed by the portions of the thread at the pits. Outer diameter of the nut body is increased by 5% as compared with that of a standard nut, so that original load 920MPa is increased to 1030MPa and firmness is higher.

Description

A kind of locking nut

Technical field

The utility model belongs to the technical field of fastening piece, and especially the bolt type fastening piece is specifically related to a kind of locking nut.

Background technique

Fastening piece is to be used between the mechanical part connecting and indispensable part that device is fixing, and bolt, nut are modern structure and the widest the connection and one of fastening accessory during machinery is used.Though plain bolt, nut all have self-locking performance in use, be subjected to the external force factor effect, when changing greatly as vibration, impact, variable load and thermal stress, the connection of bolts and nuts is prone to loosening, even occurs coming off.Nut loosening will cause connecting or the reducing even lose of fastening strength, thereby influence the quality of connection of bolts and nuts, cause each parts of connection to damage prematurely, even cause equipment failure and personal safety accident.The technological scheme of present use or disclosed lock nut, the locking safety reliability that has is not ideal, and the complex structure that has is made loaded down with trivial details, the operation inconvenience that has.From fit on, original assembling nut, especially required precision all need to assemble with torque spanner than higher occasion.Therefore in assembly process, the king-bolt of exerting oneself can rupture, if exert oneself the too small assembling effect that then do not reach.

The model utility content

At problems of the prior art, the purpose of this utility model is to provide a kind of technological scheme of locking nut, and is simple in structure, only tightens with common wrench moment of torsion is put in place, and the pit that the bulge loop surface is squeezed out makes screw thread distortion lock bolt.

Described a kind of locking nut comprises nut main body, it is characterized in that a side end face of nut main body is provided with bulge loop, is provided with coaxial screwed hole of centre with the aperture in nut main body and the bulge loop.Wherein the bulge loop height is the 1/11-1/9 of nut main body height, and the upper surface of bulge loop squeezes out pit by external force, and pit is that central point is symmetrical branch with the center of circle of bulge loop.Simultaneously, the external diameter of nut main body is 1.05D-1.20D, and one-body molded with bulge loop, and wherein D is the nut nominal diameter.

The utility model is simple in structure, reasonable in design, bulge loop is set on nut main body, squeeze out several pits by external force on the bulge loop, pit deforms the screw thread at this place, therefore when being screwed into herein, can be obstructed when bolt, adopt common wrench with bolt, nut screwing clamping this moment, get final product so that moment of torsion puts in place, and the screw thread of pit distortion can be locked bolt.The external diameter of nut main body increases more than 5% than the nut external diameter of standard, makes on the load and increases to 1030MPa from original 920MPa, and soundness is stronger.

Description of drawings

Fig. 1 is the utility model embodiment's a structural representation;

Fig. 2 is the utility model embodiment's a plan structure schematic representation;

Fig. 3 is the utility model embodiment's a main TV structure schematic representation.

Among the figure: 1-nut main body, 2-bulge loop, 3-screwed hole of centre, 4-pit.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further.

A kind of locking nut as shown in the figure comprises nut main body 1, on the side end face of nut main body 1 bulge loop 2 is set, and bulge loop 2 highly is the 1/11-1/9 of nut main body 1 height, and nut main body 1 and bulge loop 2 are formed in one.Be provided with coaxial screwed hole of centre 3 with the aperture in nut main body 1 and the bulge loop 2, the upper surface of bulge loop 2 squeezes out pit 4.Pit 4 is with the central point branch of bulge loop 2 upper surface at bulge loop 2, and pit 4 makes screw thread generation deformation herein.In actual mechanical process, generally, 4 pits are advisable so that being set, and symmetrical branch makes the screw thread distortion impartial at the upper surface of bulge loop 2, and is bolt strained even.

The external diameter of nut main body 1 is 1.05D-1.20D, and D is the nut nominal diameter.Nut external diameter than standard increases more than 5%, makes on the load and increases to 1030MPa from original 920MPa, and soundness is stronger.

Bolt is identical with the plain nut operation during from nut main body 1 one end precessions, when bolt is screwed into bulge loop 2 parts, the some pits 4 that squeeze out on the bulge loop 2 make screw thread generation deformation, when being screwed into herein, bolt can be obstructed, adopt common wrench with bolt, nut screwing clamping this moment, can be so that moment of torsion put in place, and the screw thread of pit distortion can be locked bolt, prevents that effectively extraneous vibration, impact etc. from causing bolts and nuts to produce loosening situation about breaking away from and taking place.

Claims

1. locking nut, comprise nut main body (1), a side end face that it is characterized in that nut main body (1) is provided with bulge loop (2), is provided with coaxial screwed hole of centre with the aperture (3) in nut main body (1) and the bulge loop (2), and the upper surface of bulge loop (2) squeezes out pit (4) by external force.

2. a kind of locking nut as claimed in claim 1 is characterized in that described bulge loop (2) highly is nut main body (1) 1/11-1/9 highly.

3. a kind of locking nut as claimed in claim 2 is characterized in that described pit (4) is that central point is symmetrical branch with the center of circle of bulge loop (2).

4. a kind of locking nut as claimed in claim 3, the external diameter that it is characterized in that described nut main body (1) is 1.05D-1.20D, D is the nut nominal diameter.

5. as each described a kind of locking nut of claim 1-4, it is characterized in that described nut main body (1) and bulge loop (2) are one-body molded.